--- title: "L-Theanine vs DSIP: Side-by-Side Comparison (2026)" url: https://www.bodyhackguide.co/compare/l-theanine-vs-dsip description: "Compare L-Theanine vs DSIP side by side. We earn a commission on some vendor links. Mechanism, half-life, dose range, side effects and prices. DSIP from $34.99." lang: en --- Skip to content Compare notes on r/BodyHackGuide (https://reddit.com/r/bodyhackguide) Compare notes with other researchers. Join r/BodyHackGuide (https://reddit.com/r/bodyhackguide) # L-Theanine vs DSIP (Delta Sleep-Inducing Peptide) Side-by-side comparison of L-Theanine and DSIP (Delta Sleep-Inducing Peptide): mechanism, half-life, dose range, safety profile, and vendor pricing. L-Theanine: no price on file DSIP (Delta Sleep-Inducing Peptide) from $34.99 ## Price snapshot ### L-Theanine Current low — 7-day low — not enough history yet 30-day low — not enough history yet 30-day change — not enough history yet ### DSIP (Delta Sleep-Inducing Peptide) Current low $34.99 current listings 7-day low — not enough history yet 30-day low — not enough history yet 30-day change — not enough history yet ## L-Theanine L-Theanine is a non-proteinogenic amino acid found almost exclusively in tea (Camellia sinensis) and a handful of edible mushrooms, and it has become the single most widely-used calm-focus nootropic in the modern… No vendor price on file. Full L-Theanine profile (https://www.bodyhackguide.co/compound/l-theanine) ## DSIP (Delta Sleep-Inducing Peptide) Delta sleep-inducing peptide (DSIP) is a nonapeptide — a 9-amino-acid neuropeptide with sequence Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu (WAGGDASGE, 848 Da molecular weight) — first isolated in 1977 from the cerebral venous… **Lowest listed price:** $34.99 across 11 listings Full DSIP (Delta Sleep-Inducing Peptide) profile (https://www.bodyhackguide.co/compound/dsip) ## Side-by-side comparison | Attribute | L-Theanine | DSIP (Delta Sleep-Inducing Peptide) | | --- | --- | --- | | Category | Nootropics | Cognition, Mood & Neuroprotection | | Research Stage | FDA Approved | Research Use Only | | Mechanism of Action | L-Theanine is a weak, broad-spectrum neurotransmitter modulator that produces its "relaxed alertness" signature through small simultaneous effects on glutamate, GABA, monoamines, and cortical oscillatory activity — rather than through strong action at any… | Primary Mechanism: Uncharacterized Direct Receptor Binding After more than four decades of research, DSIP's primary molecular target remains unknown. No specific receptor has been cloned, characterized, or reproducibly identified as the primary binding site… | | Half-Life | 1-3 hours (plasma); central CNS effect 3-5 hours | ~7-15 minutes (IV; plasma clearance is rapid, though subjective sleep effects can outlast measurable blood levels) | | Typical Dose Range | — | 100–300 mcg per injection | | Dosing Frequency | — | Once daily, 30–60 minutes before bedtime | | Administration | Oral | Subcutaneous, Intramuscular, Intranasal | | Side Effects | L-theanine has one of the cleanest safety profiles of any CNS-active nootropic, with no dependence, withdrawal, tolerance, or serious adverse events reported in controlled trials at doses up to 900mg/day for weeks to months. Common mild side effects (all… | Overall Safety Profile DSIP has one of the cleanest safety profiles of any peptide in the research chemical space. In 40+ years of research and clinical use, no serious adverse events have been reported in controlled trials or large case series. The compound… | | Molecular Weight | 174.20 g/mol | 848.8 Da | | Common Vial Sizes | — | 2mg, 5mg | ## Price History 8 data points - BM - Half Nattys - LB - Ion Peptide - OF - Disguised Alpha - BHG Labs ### L-Theanine: potential benefits - No structured benefit list published. ### DSIP (Delta Sleep-Inducing Peptide): potential benefits - Sleep quality support - Stress reduction - Cortisol/HPA modulation - Alcohol & opioid withdrawal support - Circadian regulation ## Frequently asked ### What's the difference between L-Theanine and DSIP (Delta Sleep-Inducing Peptide)? L-Theanine is a nootropics that l-theanine is a weak, broad-spectrum neurotransmitter modulator that produces its "relaxed alertness" signature through small simultaneous effects on glutamate, gaba, monoamines,…. DSIP (Delta Sleep-Inducing Peptide) is a cognition, mood & neuroprotection that primary mechanism: uncharacterized direct receptor binding after more than four decades of research, dsip's primary molecular target remains unknown. no specific receptor has been…. The two differ in mechanism, half-life (1-3 hours (plasma); central CNS effect 3-5 hours vs ~7-15 minutes (IV; plasma clearance is rapid, though subjective sleep effects can outlast measurable blood levels)), and typical dose range. ### Which has the longer half-life, L-Theanine or DSIP (Delta Sleep-Inducing Peptide)? L-Theanine has a half-life of 1-3 hours (plasma); central CNS effect 3-5 hours. DSIP (Delta Sleep-Inducing Peptide) has a half-life of ~7-15 minutes (IV; plasma clearance is rapid, though subjective sleep effects can outlast measurable blood levels). Longer half-lives generally mean less frequent dosing but slower on/off kinetics. ### Can you stack L-Theanine and DSIP (Delta Sleep-Inducing Peptide)? Stacking depends on mechanism overlap, safety profile, and goals. L-Theanine and DSIP (Delta Sleep-Inducing Peptide) should only be stacked after reviewing each compound's individual protocol page, side effect profile, and any published interaction data. Use the BodyHackGuide stack builder for a structured review before combining research compounds. ## See current vendor prices Listings from the vendors we track. Prices change often, so check the vendor before you buy. L-Theanine prices: https://www.bodyhackguide.co/compound/l-theanine?tab=prices DSIP (Delta Sleep-Inducing Peptide) prices: https://www.bodyhackguide.co/compound/dsip?tab=prices Compare all compounds: https://www.bodyhackguide.co/compare ### Before you buy L-Theanine or DSIP (Delta Sleep-Inducing Peptide) Check the vendor trust score. Every supplier we track is rated 0-100 on COA verification, payment transparency, shipping, reviews, and listings: one published, reproducible methodology, applied to every vendor. View Vendor Scorecard (https://www.bodyhackguide.co/vendors/scorecard) ## Related comparisons L Theanine vs L Tyrosine: https://www.bodyhackguide.co/compare/l-theanine-vs-l-tyrosine L Theanine vs Glycine: https://www.bodyhackguide.co/compare/l-theanine-vs-glycine DSIP vs Melatonin: https://www.bodyhackguide.co/compare/dsip-vs-melatonin **Research use only.** BodyHackGuide is a research and price-comparison reference. The compounds discussed on this page are not approved by the FDA for human consumption and are sold strictly for laboratory research. Prices shown are pulled from vendor listings tracked on BHG and are subject to change. Every vendor is ranked on the same public, reproducible methodology. See editorial standards (https://www.bodyhackguide.co/editorial-standards) and affiliate disclosure (https://www.bodyhackguide.co/affiliate-disclosure). BodyHackGuide (https://www.bodyhackguide.co/) Your biohacking research hub: compound pricing, brain health protocols, dosing tools, and vendor reviews. support@bodyhackguide.co Join our Discord: https://discord.gg/Mhq5UdRYBA r/BodyHackGuide on Reddit: https://reddit.com/r/BodyHackGuide **Affiliate Disclosure:** We rank every vendor on the same public, reproducible methodology (https://www.bodyhackguide.co/vendors/methodology). Full details in our affiliate disclosure (https://www.bodyhackguide.co/affiliate-disclosure). **Research Disclaimer:** All compounds listed are for laboratory and research purposes only. Not for human consumption. This site does not sell or ship any products. Always consult a qualified healthcare professional and comply with local regulations. © 2026 BodyHackGuide. 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